To learn more about ON Semiconductor, please visit our website at www.onsemi.com Is Now Part of ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
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To learn more about ON Semiconductor, please visit our website at www.onsemi.com
Is Now Part of
ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
Low Total Harmonic Distortion (THD)Precise Adjustable Output Over-Voltage ProtectionOpen-Feedback Protection and Disable FunctionZero Current Detector150µs Internal Start-up Timer MOSFET Over-Current ProtectionUnder-Voltage Lockout with 3.5V HysteresisLow Start-up (40µA) and Operating Current (1.5mA)Totem Pole Output with High State Clamp+500/-800mA Peak Gate Drive Current8-Pin DIP or 8-Pin SOP
ApplicationsAdapterBallastLCD TV, CRT TVSMPS
Related Application NotesAN-6026 - Design of Power Factor Correction Circuit Using FAN7529
Description The FAN7529 is an active power factor correction (PFC)controller for boost PFC applications that operates in crit-ical conduction mode (CRM). It uses the voltage modePWM that compares an internal ramp signal with theerror amplifier output to generate MOSFET turn-off sig-nal. Because the voltage-mode CRM PFC controller doesnot need rectified AC line voltage information, it saves thepower loss of the input voltage sensing network neces-sary for the current-mode CRM PFC controller.
FAN7529 provides many protection functions, such asover-voltage protection, open-feedback protection, over-current protection, and under-voltage lockout protection.The FAN7529 can be disabled if the INV pin voltage islower than 0.45V and the operating current decreases to65µA. Using a new variable on-time control method,THD is lower than the conventional CRM boost PFC ICs.
Ordering Information
Part NumberOperating Temp.
Range Pb-Free Package Packing MethodMarking
CodeFAN7529N -40°C to +125°C Yes 8-DIP Rail FAN7529
FAN7529M -40°C to +125°C Yes 8-SOP Rail FAN7529
FAN7529MX -40°C to +125°C Yes 8-SOP Tape & Reel FAN7529
1 INV This pin is the inverting input of the error amplifier. The output voltage of the boost PFCconverter should be resistively divided to 2.5V.
2 COMP This pin is the output of the transconductance error amplifier. Components for outputvoltage compensation should be connected between this pin and GND.
3 MOTThis pin is used to set the slope of the internal ramp. The voltage of this pin is main-tained at 2.9V. If a resistor is connected between this pin and GND, current flows out ofthe pin and the slope of the internal ramp is proportional to this current.
4 CSThis pin is the input of the over-current protection comparator. The MOSFET current issensed using a sensing resistor and the resulting voltage is applied to this pin. Aninternal RC filter is included to filter switching noise.
5 ZCD This pin is the input of the zero current detection block. If the voltage of this pin goeshigher than 1.5V, then goes lower than 1.4V, the MOSFET is turned on.
6 GND This pin is used for the ground potential of all the pins. For proper operation, the signalground and the power ground should be separated.
7 OUTThis pin is the gate drive output. The peak sourcing and sinking current levels are+500mA and -800mA respectively. For proper operation, the stray inductance in thegate driving path must be minimized.
8 VCCThis pin is the IC supply pin. IC current and MOSFET drive current are supplied usingthis pin.
Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. Theabsolute maximum ratings are stress ratings only. TA = 25°C unless otherwise specified.
Thermal Impedance(1)
Note:1. Regarding the test environment and PCB type, please refer to JESD51-2 and JESD51-10.
Symbol Parameter Value UnitVCC Supply Voltage VZ V
IOH, IOL Peak Drive Output Current +500/-800 mA
Iclamp Driver Output Clamping Diodes VO>VCC or VO<-0.3V ±10 mA
Idet Detector Clamping Diodes ±10 mA
VIN Error Amplifier, MOT, CS Input Voltages -0.3 to 6 V
TJ Operating Junction Temperature 150 °C
TA Operating Temperature Range -40 to 125 °C
TSTG Storage Temperature Range -65 to 150 °C
VESD_HBM ESD Capability, Human Body Model 2.0 kV
VESD_MM ESD Capability, Machine Model 300 V
VESD_CDM ESD Capability, Charged Device Model 500 V
Applications Information 1. Error Amplifier BlockThe error amplifier block consists of a transconductanceamplifier, output OVP comparator, and disable compara-tor. For the output voltage control, a transconductanceamplifier is used instead of the conventional voltageamplifier. The transconductance amplifier (voltage con-trolled current source) aids the implementation of OVPand disable function. The output current of the amplifierchanges according to the voltage difference of the invert-ing and non-inverting input of the amplifier. The outputvoltage of the amplifier is compared with the internalramp signal to generate the switch turn-off signal. TheOVP comparator shuts down the output drive block whenthe voltage of the INV pin is higher than 2.675V andthere is 0.175V hysteresis. The disable comparator dis-ables the operation of the FAN7529 when the voltage ofthe inverting input is lower than 0.45V and there is100mV hysteresis. An external small signal MOSFETcan be used to disable the IC, as shown in Figure 33.The IC operating current decreases below 65µA toreduce power consumption if the IC is disabled.
Figure 33. Error Amplifier Block
2. Zero Current Detection BlockThe zero current detector (ZCD) generates the turn-onsignal of the MOSFET when the boost inductor currentreaches zero using an auxiliary winding coupled with theinductor. If the voltage of the ZCD pin goes higher than1.5V, the ZCD comparator waits until the voltage goes
below 1.4V. If the voltage goes below 1.4V, the zero cur-rent detector turns on the MOSFET. The ZCD pin is pro-tected internally by two clamps, 6.7V-high clamp and0.65V-low clamp. The 150µs timer generates a MOSFETturn-on signal if the drive output has been low for morethan 150µs from the falling edge of the drive output.
Figure 34. Zero Current Detector Block
3. Sawtooth Generator BlockThe output of the error amplifier and the output of thesawtooth generator are compared to determine theMOSFET turn-off instance. The slope of the sawtooth isdetermined by an external resistor connected to theMOT pin. The voltage of the MOT pin is 2.9V and theslope is proportional to the current flowing out of theMOT pin. The internal ramp signal has a 1V offset; there-fore, the drive output is shut down if the voltage of theCOMP pin is lower than 1V. The MOSFET on-time ismaximum when the COMP pin voltage is 5V. Accordingto the slope of the internal ramp, the maximum on-timecan be programmed. The necessary maximum on-timedepends on the boost inductor, lowest AC line voltage,and maximum output power. The resistor value shouldbe designed properly.
4. Over-Current Protection BlockThe MOSFET current is sensed using an external sens-ing resistor for the over-current protection. If the CS pinvoltage is higher than 0.8V, the over-current protectioncomparator generates a protection signal. An internal RCfilter is included to filter switching noise.
Figure 36. Over-Current Protection Block
5. Switch Drive BlockThe FAN7529 contains a single totem-pole output stagedesigned for direct drive of the power MOSFET. Thedrive output is capable of up to +500/-800mA peak cur-rent with a typical rise and fall time of 50ns with 1nF load.The output voltage is clamped to 13V to protect theMOSFET gate if the VCC voltage is higher than 13V.
6. Under-Voltage Lockout BlockIf the VCC voltage reaches 12V, the IC’s internal blocksare enabled and start operation. If the VCC voltage dropsbelow 8.5V, most of the internal blocks are disabled toreduce the operating current. VCC voltage should behigher than 8.5V under normal conditions.
8-SOPDimensions are in millimeters (inches) unless otherwise noted.
Figure 41. 8-Lead Small Outline Package (SOP)
September 2001, Rev B1sop8_dim.pdf
4.92
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0.19
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0.41
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0
0.01
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.004
1.27
0.05
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5.720.225
1.55 ±0.20
0.061 ±0.008
0.1~0.250.004~0.001
6.00 ±0.30
0.236 ±0.012
3.95 ±0.20
0.156 ±0.008
0.50 ±0.20
0.020 ±0.008
5.13
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+0.10
-0.050.15
+0.004
-0.0020.006
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Across the board. Around the world.ActiveArrayBottomlessBuild it NowCoolFETCROSSVOLTCTL™Current Transfer Logic™ DOMEE2CMOSEcoSPARK®
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TINYOPTOTinyPowerTinyWireTruTranslation
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PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification Product Status Definition
Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice.
Preliminary First Production This datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design.
No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design.
Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only.
ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patentcoverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liabilityarising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/orspecifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customerapplication by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are notdesigned, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classificationin a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorizedapplication, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, andexpenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if suchclaim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. Thisliterature is subject to all applicable copyright laws and is not for resale in any manner.
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